N, Q  = map(int, input().split())
ans = 0
D = [0] * (N + 1)
for _ in range(Q):
    L, R = map(int, input().split())
    for i in range(L, R + 1):
        D[i] = 1 - D[i]
        if D[i]:
            ans += 1
        else:
            ans -= 1
    print(ans)